What is the mass of 90 average-sized apples if 2 dozen of the apples has a mass of 2.0 kg?

Compare and contrast physical changes with chemical changes.

Building glycogen from glucose molecules is an example of

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.